:root{--bg: #0a0a14;--bg-soft: #12121f;--panel: rgba(255, 255, 255, .035);--panel-line: rgba(255, 255, 255, .09);--ink: #e9e9f2;--ink-soft: #a6a6bd;--ink-faint: #6f6f88;--accent: #8ea2ff;--accent-warm: #ffcf6b;--hot: #d6246e;--serif: "Fraunces", Georgia, "Times New Roman", serif;--sans: "Inter", system-ui, -apple-system, sans-serif;--sp-1: 10px;--sp-2: 16px;--sp-3: 19px;--sp-4: 28px;--sp-5: 34px;--sp-6: 43px;--sp-7: 54px;--sp-8: 68px;--fs-d5: .7273rem;--fs-d4: .7907rem;--fs-d3: .8235rem;--fs-d2: .899rem;--fs-d1: .9444rem;--fs-u1: 1.0588rem;--fs-u2: 1.1124rem;--fs-u3: 1.2647rem;--fs-u4: 1.75rem;--fs-u5: 2.125rem;--fs-u6: 2.6875rem;--fs-u7: 4.25rem;--lh-display: 1.0588;--lh-title: 1.1124;--lh-snug: 1.4737;--lh-body: 1.6;--lh-loose: 1.6481}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%}body{background:radial-gradient(1200px 800px at 50% -10%,#161628 0%,var(--bg) 55%) fixed,var(--bg);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow:hidden;overscroll-behavior:none;-webkit-tap-highlight-color:transparent}#app{height:100dvh;display:flex;flex-direction:column}.gate{flex:1;display:grid;place-items:center;padding:var(--sp-5)}.gate-inner{max-width:540px;text-align:center;animation:rise .8s cubic-bezier(.16,1,.3,1) both}.gate-title{font-family:var(--serif);font-weight:500;font-size:clamp(var(--fs-u5),7vw,var(--fs-u7));line-height:var(--lh-display);letter-spacing:-.02em;background:linear-gradient(180deg,#fff,#b9c2ff 80%);-webkit-background-clip:text;background-clip:text;color:transparent}.gate-sub{margin:var(--sp-3) auto var(--sp-5);max-width:430px;color:var(--ink-soft);font-size:var(--fs-u1);line-height:var(--lh-body)}.gate-note{margin-top:var(--sp-3);color:var(--ink-faint);font-size:var(--fs-d2)}.btn{font-family:var(--sans);font-size:1rem;font-weight:500;border:1px solid transparent;border-radius:999px;padding:var(--sp-2) var(--sp-4);cursor:pointer;transition:transform .12s ease,background .2s ease,border-color .2s ease,opacity .2s;color:var(--ink);-webkit-tap-highlight-color:transparent}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.45;cursor:default}.btn-primary{background:linear-gradient(180deg,#6f86ff,#5566e8);color:#fff;box-shadow:0 6px 24px #6078ff59}.btn-primary:hover:not(:disabled){background:linear-gradient(180deg,#82a0ff,#6172f0)}.btn-ghost{background:var(--panel);border-color:var(--panel-line);color:var(--ink-soft)}.btn-ghost:hover{color:var(--ink);border-color:#fff3}.btn-begin{font-size:var(--fs-u2);padding:var(--sp-2) var(--sp-6)}.play-toggle.is-playing{background:linear-gradient(180deg,#2a2a44,#20203a);box-shadow:none}.journey{flex:1;display:flex;flex-direction:column;min-height:0}.rail{display:flex;gap:8px;justify-content:center;padding:max(16px,calc(env(safe-area-inset-top) + 8px)) 16px 6px;flex-wrap:nowrap}.rail-dot{width:28px;height:4px;flex:0 1 28px;min-width:6px;border-radius:999px;border:none;background:#ffffff1f;cursor:pointer;padding:0;transition:background .25s,width .25s}.rail-dot.is-seen{background:#8ea2ff73}.rail-dot.is-active{width:43px;background:var(--accent)}.station{flex:1;display:flex;flex-direction:column;min-height:0;width:min(720px,100%);margin:0 auto;padding:8px var(--sp-4) 0}.station-header{text-align:center;padding:var(--sp-1) 0 var(--sp-3)}.station-kicker{font-size:var(--fs-d4);letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin-bottom:8px}.station-title{font-family:var(--serif);font-weight:500;font-size:clamp(var(--fs-u4),4.5vw,var(--fs-u6));letter-spacing:-.015em;line-height:var(--lh-title)}.station-body{flex:1;min-height:0;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;padding-bottom:var(--sp-1)}.stage{background:var(--panel);border:1px solid var(--panel-line);border-radius:var(--sp-3);padding:var(--sp-2);margin-bottom:var(--sp-3)}.stage-split{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-1)}.split-col{display:flex;flex-direction:column}.viz-cap{font-size:var(--fs-d5);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-faint);text-align:center;margin-bottom:6px}.scope-wrap,.spec-wrap{position:relative;width:100%;height:clamp(160px,26vh,190px)}.scope-tall{height:clamp(190px,34vh,280px)}.scope-wrap.layered{overflow:hidden;border-radius:var(--sp-2)}.string-wrap{cursor:ew-resize}.stage-split .scope-wrap,.stage-split .spec-wrap{height:160px}.viz{position:absolute;inset:0;width:100%;height:100%;display:block}.controls{display:flex;flex-direction:column;gap:var(--sp-2);align-items:stretch;margin-bottom:var(--sp-3)}.controls .play-toggle{align-self:center}.btn-row{display:flex;gap:var(--sp-1);justify-content:center}.btn-row .btn{flex:1 1 0;max-width:280px}.ctl{width:100%}.ctl-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px}.ctl-label{font-size:var(--fs-d3);letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft)}.ctl-readout{font-size:var(--fs-d1);color:var(--accent);font-variant-numeric:tabular-nums}.ctl-range{--thumb: 28px;--track: 8px;--row: 34px;-webkit-appearance:none;appearance:none;width:100%;height:var(--row);background:transparent;outline:none;cursor:pointer;touch-action:pan-y;margin:0}.ctl-range::-webkit-slider-runnable-track{height:var(--track);border-radius:999px;background:linear-gradient(90deg,var(--accent) var(--fill, 0%),rgba(255,255,255,.12) var(--fill, 0%))}.ctl-range::-webkit-slider-thumb{-webkit-appearance:none;width:var(--thumb);height:var(--thumb);border-radius:50%;background:#fff;border:3px solid var(--accent);box-shadow:0 2px 10px #00000073;cursor:grab;margin-top:calc((var(--track) - var(--thumb)) / 2)}.ctl-range:active::-webkit-slider-thumb{cursor:grabbing;transform:scale(1.06)}.ctl-range::-moz-range-track{height:var(--track);border-radius:999px;background:#ffffff1f}.ctl-range::-moz-range-progress{height:var(--track);border-radius:999px;background:var(--accent)}.ctl-range::-moz-range-thumb{width:var(--thumb);height:var(--thumb);border-radius:50%;background:#fff;border:3px solid var(--accent);cursor:grab}.seg{display:flex;gap:6px;background:#ffffff0d;border-radius:var(--sp-1);padding:5px}.seg-btn{flex:1;border:none;background:transparent;color:var(--ink-soft);font-family:var(--sans);font-size:var(--fs-d1);padding:var(--sp-1);border-radius:9px;cursor:pointer;transition:background .2s,color .2s}.seg-btn[aria-pressed=true]{background:#8ea2ff2e;color:var(--ink)}.string-readout{text-align:center;color:var(--ink-soft);font-size:var(--fs-d1);margin-bottom:var(--sp-2);min-height:1.3em}.string-readout .agree,.agree{color:var(--accent-warm);font-weight:600}.shape-note{color:var(--ink-soft);font-size:1rem;line-height:var(--lh-snug);text-align:center;margin-top:2px;min-height:2.6em}.closing p{color:var(--ink);font-size:var(--fs-u1);line-height:var(--lh-loose);margin-bottom:var(--sp-2)}.closing b{color:#fff;font-weight:600}.closing-coda{color:var(--ink-soft)!important;border-top:1px solid var(--panel-line);padding-top:var(--sp-2);margin-top:4px}.prompt{color:var(--ink);font-size:var(--fs-u1);line-height:var(--lh-body);margin-bottom:var(--sp-3)}.prompt b{color:#fff;font-weight:600}.deeper{border:1px solid var(--panel-line);border-radius:var(--sp-2);background:#ffffff05;overflow:hidden}.deeper-summary{list-style:none;cursor:pointer;padding:var(--sp-2) var(--sp-3);font-weight:500;color:var(--ink-soft);transition:color .2s}.deeper-summary::-webkit-details-marker{display:none}.deeper-summary:hover{color:var(--ink)}.deeper-icon{display:inline-block;color:var(--accent);transition:transform .2s;margin-right:6px}.deeper[open] .deeper-icon{transform:rotate(180deg)}.deeper-body{padding:0 var(--sp-3) var(--sp-3);color:var(--ink-soft);font-size:1rem;line-height:var(--lh-body)}.deeper-body p+p{margin-top:var(--sp-1)}.deeper-body em{color:var(--ink);font-style:normal;border-bottom:1px dotted rgba(255,255,255,.25)}.station-nav{display:flex;align-items:center;justify-content:center;gap:var(--sp-3);padding:16px 0 max(19px,env(safe-area-inset-bottom))}.nav-btn{width:var(--sp-7);height:var(--sp-7);border-radius:50%;border:1px solid var(--panel-line);background:var(--panel);color:var(--ink);font-size:var(--fs-u3);cursor:pointer;transition:background .2s,opacity .2s,transform .12s}.nav-btn:hover:not(:disabled){background:#ffffff17}.nav-btn:active:not(:disabled){transform:scale(.94)}.nav-btn:disabled{opacity:.3;cursor:default}.nav-counter{color:var(--ink-faint);font-size:var(--fs-d2);font-variant-numeric:tabular-nums;min-width:var(--sp-7);text-align:center}@keyframes rise{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}.station.anim-in .station-header,.station.anim-in .station-body{animation:stationIn .42s cubic-bezier(.16,1,.3,1) both}.station.anim-in .station-body{animation-delay:.04s}@keyframes stationIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.journey-foot,.gate-foot{text-align:center;padding:4px 0 max(10px,env(safe-area-inset-bottom))}.gate-foot{position:fixed;left:0;right:0;bottom:0}.src-link{background:none;border:none;color:var(--ink-faint);font-family:var(--sans);font-size:var(--fs-d3);letter-spacing:.04em;cursor:pointer;padding:8px var(--sp-1);text-decoration:underline;text-underline-offset:3px;text-decoration-color:#fff3;transition:color .2s}.src-link:hover{color:var(--ink-soft)}.build-tag{color:var(--ink-faint);opacity:.5;font-size:var(--fs-d4)}.src-overlay{position:fixed;inset:0;z-index:50;background:#04040ab3;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);display:grid;place-items:center;padding:var(--sp-3);opacity:0;transition:opacity .2s ease}.src-overlay.is-open{opacity:1}.src-panel{position:relative;max-width:540px;max-height:86dvh;overflow-y:auto;background:linear-gradient(180deg,#14142400,#141424),var(--bg-soft);border:1px solid var(--panel-line);border-radius:var(--sp-3);padding:var(--sp-4) clamp(19px,5vw,34px) var(--sp-5);transform:translateY(16px) scale(.98);transition:transform .24s cubic-bezier(.16,1,.3,1);-webkit-overflow-scrolling:touch}.src-overlay.is-open .src-panel{transform:none}.src-close{position:absolute;top:16px;right:16px;width:var(--sp-5);height:var(--sp-5);border-radius:50%;border:1px solid var(--panel-line);background:var(--panel);color:var(--ink-soft);font-size:1rem;cursor:pointer}.src-close:hover{color:var(--ink)}.src-panel h2{font-family:var(--serif);font-weight:500;font-size:var(--fs-u4);margin-bottom:var(--sp-2);padding-right:var(--sp-4)}.src-panel h3{font-size:var(--fs-d4);letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:var(--sp-3) 0 8px}.src-panel p{color:var(--ink-soft);font-size:1rem;line-height:var(--lh-body)}.src-panel b,.src-panel i{color:var(--ink)}.src-panel i{font-style:italic}.src-fine{margin-top:var(--sp-3);padding-top:var(--sp-2);border-top:1px solid var(--panel-line);font-size:var(--fs-d2)!important}@media(prefers-reduced-motion:reduce){*{animation-duration:1ms!important;transition-duration:1ms!important}}@media(max-width:540px){.station{padding:8px 16px 0}.station-header{padding:6px 0 var(--sp-1)}.stage{padding:10px}.stage-split{grid-template-columns:1fr}.stage-split .scope-wrap,.stage-split .spec-wrap{height:160px}.prompt{font-size:1rem}.controls{gap:var(--sp-3);margin-bottom:var(--sp-3)}.nav-btn{width:43px;height:43px}}@media(pointer:coarse){.ctl-range{--thumb: 43px;--track: 10px;--row: 54px}.ctl-head{margin-bottom:4px}.ctl{user-select:none;-webkit-user-select:none}.seg-btn{padding:16px var(--sp-1);font-size:1rem}.btn{padding:var(--sp-2) var(--sp-4)}.play-toggle{min-height:var(--sp-7)}.deeper-summary{padding:var(--sp-3)}.src-link{padding:var(--sp-1) var(--sp-2)}.rail-dot{position:relative}.rail-dot:after{content:"";position:absolute;inset:-16px 0}}@media(max-height:480px)and (orientation:landscape){.rail{padding-top:8px}.station-header{padding:4px 0 8px}.scope-wrap,.spec-wrap,.scope-tall{height:42vh}.station-nav{padding:8px 0}}.history-body{overflow:auto}.history-body #history{min-height:100dvh}.hist-page{padding-bottom:72px}.hist-page .station-header{padding-top:var(--sp-6)}.hist-standfirst{max-width:540px;margin:var(--sp-2) auto 0;color:var(--ink-soft);font-size:var(--fs-u1);line-height:var(--lh-body);text-align:center}.hist-section{margin:var(--sp-3) 0;padding:var(--sp-3) var(--sp-3) var(--sp-2)}.hist-section h2{font-family:var(--serif);font-weight:500;font-size:var(--fs-u3);margin:0 0 var(--sp-1);color:var(--ink)}.hist-when{font-family:var(--sans);font-size:var(--fs-d5);letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin-left:10px;white-space:nowrap}.hist-section p{font-size:1rem;line-height:var(--lh-loose);color:var(--ink);margin:0 0 var(--sp-1)}.hist-section p:last-child{margin-bottom:0}.hist-section b{color:#fff}.hist-note{border-left:2px solid var(--accent-warm);padding-left:var(--sp-2);color:var(--ink-soft);font-style:italic}.hist-fig{margin:6px 0 var(--sp-2)}.hist-fig img{display:block;width:100%;height:auto;border-radius:var(--sp-1);border:1px solid var(--panel-line)}.hist-fig figcaption{margin-top:8px;font-size:var(--fs-d3);color:var(--ink-faint);line-height:var(--lh-snug)}.hist-small{max-width:280px;float:right;margin:4px 0 10px var(--sp-3)}.hist-pair{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-2);align-items:start}.hist-credit{color:var(--ink-faint)}.hist-close{border-color:#8ea2ff59}.hist-coda{border-top:1px solid var(--panel-line);padding-top:var(--sp-2);margin-top:var(--sp-3);font-size:var(--fs-d3)!important;color:var(--ink-faint)!important;line-height:var(--lh-body)}.hist-back{text-align:center;margin-top:var(--sp-3)}.hist-back a.btn{text-decoration:none;display:inline-block}@media(max-width:540px){.hist-pair{grid-template-columns:1fr}.hist-small{float:none;max-width:100%;margin:4px 0 10px}.hist-section{padding:var(--sp-3) var(--sp-2) var(--sp-2)}}.hist-link{color:var(--accent);text-decoration:underline;text-underline-offset:3px}.hist-link:hover{color:#fff}